Improved window-shade fixture



UNITED STATES PATENT OFFICE.

F. J. B. HUBERT, OF NEW YORK, N. Y.Y

IMPROVED WINDOW-SHADE FIXTURE.

i Specification forming part of Letters Patent- No. 43,503Qdated July 12, 1864.

To all whom it may concern:

Be it known that I, F. J. B. HUBERT, of the city, county, and State of New York, haveinvented a new and useful Improvement in Window-Shade Fixtures; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable any person skilled in the art to make and use the same, reference being` had to the accompanying drawings, making a part of this speeilioaton, in which- Figure lis a front or-face view of my invention; Fig. 2, a vertical section of the saine, taken in the lille .fr ai, Fig. l; Fig 3, an inner view of the coil or volute thread which gears into a rack pertainingto the same.

Similar letters of reference indicate like. parts.

This invention relates to a new and improved means for adjusting the lower pulley, over which the roller-cord of the shade passes, whereby said cord may always be kept in a proper state ot' tension to insure the turning ot' the roller in order to raise and lower the shade.

The object of the invention is to obtain a device for the purpose specihed which will be strong and durable and capable of heilig' adjusted withfacility, the ordinary devices for the same purpose being liable to get out of repair, and most of them after being but a, short time in use adjusted with considerable difficulty.

In Figs. l and 2, A representsa metal plate, which is secured by screws a to the side of the windowjanio, and has a smaller plate or bar, B, secured vertically to its outer side, said bar B being provided at its inner side 1 with a vertical groove or recess, b, in which a l rack-bar, C, is fitted and allowed to slide freely. This rack-bar C has its rack c formed on its outer side, and its teeth are portions of arcs of circles to receive a coil or volute thread, d, which is on the face of a wheel, D, the latter having an inclined position, so that the upper part of the thread will gear into the rack, as shown clearly in- Fig 2. The wheel l) is placed upon a shaft, E, the latter having its` bearing in a projection or hub, e, on the bar B, and the shaft having a knob, f, on its outer end, by which the wheel D is turned.

Ou the upper end of the rack-bar O thereis formed a loop, g, in which a pulley, E', is fitted, and around which the roller-cord F passes.

From the above description it will be seen that by turning the wheel D the rackbar C may be raised and lowered, and the cord consequently stretched and kept at a proper state of tension at all times.

The several parts are not liable to get out of repair. They are firmly retained in position, the coil or volute thread always remaining in.gear with the rack. I

Having thus described my invention, I claim as new and desire to secure by Letters Patentlhe rack bar C, provided with the pulley E and the rack e, the latter having 'its teeth curved, forming parts of arcs of circles, in combination with the inclined wheel D, having a coil or volute thread, d, on its face to gear into the rack c, all arranged and applied to the plate A and bar B, substantially as and for the purpose herein set forth.

F. J. B. HUBERT.

Witnesses:

M. M. Livnves'roiv, J. P. HALL. 

